EP0900473A1 - Dispositif d'entrainement pour cages de laminoir - Google Patents

Dispositif d'entrainement pour cages de laminoir

Info

Publication number
EP0900473A1
EP0900473A1 EP97923797A EP97923797A EP0900473A1 EP 0900473 A1 EP0900473 A1 EP 0900473A1 EP 97923797 A EP97923797 A EP 97923797A EP 97923797 A EP97923797 A EP 97923797A EP 0900473 A1 EP0900473 A1 EP 0900473A1
Authority
EP
European Patent Office
Prior art keywords
converter
drive device
designed
roll stands
stands according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP97923797A
Other languages
German (de)
English (en)
Other versions
EP0900473B1 (fr
Inventor
Theodor Salzmann
Johann Wokusch
Rolf-Dieter Klug
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19639962A external-priority patent/DE19639962A1/de
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0900473A1 publication Critical patent/EP0900473A1/fr
Application granted granted Critical
Publication of EP0900473B1 publication Critical patent/EP0900473B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
    • H05K7/1427—Housings
    • H05K7/1432—Housings specially adapted for power drive units or power converters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1422—Printed circuit boards receptacles, e.g. stacked structures, electronic circuit modules or box like frames
    • H05K7/1427—Housings
    • H05K7/1432—Housings specially adapted for power drive units or power converters
    • H05K7/14325—Housings specially adapted for power drive units or power converters for cabinets or racks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/46—Roll speed or drive motor control

Definitions

  • the invention relates to a drive device for roll stands with an air-cooled converter.
  • the object of the invention is to provide a converter for drives of rolling stands, which is cheaper to manufacture than the known converters in this power range.
  • Power range from 1 to 20 MW are not considered suitable.
  • inverters with air cooling can be implemented in the power range specified above.
  • Air-cooled inverters of this type have stood out from known water-cooled ones Inverters in the performance range mentioned above have proven to be particularly cost-effective and low-maintenance.
  • heat sinks electrically connect individual power semiconductors that can be switched off.
  • This electrical connection also represents a good thermal connection, so that the heat falling off in the power semiconductors is dissipated in a sufficient manner. It has furthermore proven to be advantageous to use heat sinks with such a high thermal capacity that the heat sinks react thermally sluggishly during load peaks.
  • the drive device according to the invention is particularly suitable for converters with low switching frequencies.
  • the drive system according to the invention is used particularly advantageously at lower switching frequencies of the converter ⁇ 250 Hz.
  • the drive system according to the invention is particularly advantageous for medium switching frequencies ⁇ 100 Hz.
  • the converter has a blower which supplies ambient air or precooled air to the heat sinks or which advantageously sucks ambient air through the heat sinks.
  • FIG. 3 shows a converter arrangement with an automation device connected via optical fibers
  • FIG. 4 shows a three-point inverter with GTO thyristors (main circuit without circuitry)
  • FIG. 5 shows a three-point switch module with RC-GTOs and wiring network
  • 7 shows a converter arrangement for supplying a three-phase motor with an open winding with partial converters in a three-point circuit
  • FIG. 8 shows the mechanical construction of a converter according to the invention
  • FIG. 9 shows the use of a Inverter according to the invention in a rolling mill.
  • FIG. 1 shows a converter-fed motor 15 with a diode rectifier 2 on the network side.
  • the converter arrangement is preferably designed as a series connection of two B6 diode bridges.
  • the network-side connection is made via a transformer 1 with two secondary winding systems, preferably offset by an electrical 30 °, in order to achieve a 12-pulse network reaction.
  • the diode rectifier 2 is on the DC side via the
  • Voltage intermediate circuit 3 is connected to the inverter 4 on the machine side.
  • the DC link connection is preferably made via three poles, the positive and negative DC link pole and the DC voltage center.
  • the inverter 4 on the mesh side is designed as a self-commutated inverter in a three-point circuit, to the output side of which the three-phase motor 15 is connected via three conductors.
  • FIG. 2 shows a converter-fed motor 9 with a self-controlled rectifier and inverter 6 and 8 also on the network side.
  • the converter arrangement consists of a line-side self-commutated rectifier 6, which is connected on the DC voltage side to the machine-side inverter 8 via the voltage intermediate circuit 7. Both partial converters 6 and 8 are designed in a three-point circuit and the intermediate circuit connection is preferably made via three poles, the positive and negative intermediate circuit and the DC voltage center.
  • the network-side self-commutated rectifier 6 is connected to the network via the transformer 5.
  • the circuit is preferably identical to that of the machine-side inverter 8 and enables both operation as a rectifier and as an inverter for energy recovery, e.g. when the motor is braking 9.
  • the mesh side inverter is connected to the three-phase motor on its output side by three conductors.
  • the converter 3 shows a converter arrangement with an automation device 14 for controlling the converter 16, the All information is exchanged via an optical fiber connection 13.
  • the converter 16 has a line converter 10, a voltage intermediate circuit 11 and a machine converter 12.
  • the power connections of the partial converters to the mains and the motor can be made, for example, according to FIG. 1 and FIG. 2.
  • the converter 10 contains all the sensors required for operation and monitoring, so that no further connection to the environment is required. It is not shown that both the converter and the automation device require an auxiliary power supply or battery.
  • the P-side is between the positive DC voltage pole 56 and the negative DC voltage pole 57
  • the connection point between the first and second GTO of a phase module and the third and fourth GTO of a phase module is connected via two additional diodes connected in series opposite to the GTO's, the center of these two diodes is connected to the DC voltage center 58.
  • the connection point between the second and third GTO of a phase module forms the respective output terminal which is connected to the motor 53. 5 shows a three-point inverter module with
  • X16 is connected to the cathode with the DC voltage center 25 and the anode with the connection point of the third RC-GTO's V3 to the fourth RC-GTO V4.
  • the connection point between the second RC-GTO V2 and the third RC-GTO V3 forms the AC voltage output of the phase module V (V or W).
  • the wiring networks V21 and V22 with C7 and Cl as well as 724 and V23 with C17 and Cll serve to limit the rate of voltage rise when switching the GTOs.
  • the resistors R3 and R4 the energy stored in the respective wiring network for each switching operation is converted into heat and the overloading of the capacitors Cl and Cll is prevented or returned.
  • the two RCD wiring networks R11, C9, V25 and R21, C19, V26 serve as additional wiring for the two middle RC-GTO's V2 and V3. They are advantageously used in high-performance converters with the resulting large mechanical dimensions in order to prevent overvoltages on the assembly to avoid parasitic inductances from the GTOs V2 and V3.
  • FIG. 6 shows a converter arrangement for supplying a three-phase current, the line-side partial converter 33 and the motor-side partial converter 34 with GTOs in three-point switching, in each case being designed identically.
  • the main circuit of a phase module with its wiring network 40 or 41 is shown in each case.
  • the P-side intermediate circuit capacitor 37 forms together with the N-side
  • DC link capacitor 39 is the DC link via which the two partial converters are connected.
  • the P-side wiring load resistor 36 and the N-side wiring load resistor 38 are connected to the respective side of the wiring networks 40 and 41, respectively.
  • the line-side partial converter 33 is connected on the output side to the line 30 via the transformer 31 and the circuit breaker 32.
  • the machine-side partial converter 34 is connected on the output side to the three-phase motor 35.
  • a first converter 74 and a second converter 75 are each connected on the output side to one side 71 and 72 of the open three-phase winding of the three-phase motor 73.
  • this arrangement achieves a particularly advantageous operating behavior since, provided the pulse method is appropriately coordinated, largely sinusoidal current flow in the motor with a low harmonic load is achieved even with a low switching frequency of the GTO thyristors.
  • the first converter 74 is connected to the power supply network 60 via an optional network-side additional inductance 63 and a first transformer 61, for example in a star / delta connection.
  • the second converter 75 is advantageously electrically connected via an optional network-side additional inductance 64 and a second transformer 62 30 ° offset from the first transformer 61 (eg star / star connection) connected to the power supply network 60.
  • This arrangement leads to particularly favorable network reactions, particularly if, as in the present example, the converters consist of partial converters in a three-point connection. This results in a sinusoidal current profile with a very low harmonic content even when the self-commutated line rectifiers are exposed to fundamental vibrations.
  • the two converters 74 and 75 each have line-side partial converters 66 and 65 and machine-side partial converters 69 and 70, which are each connected via a DC voltage intermediate circuit 67 and 68, respectively.
  • the two DC voltage intermediate circuits 67 and 68 are electrically separated from one another.
  • All partial inverters 66, 65, 69, 70 are designed in a three-point circuit, preferably with RC GTOs.
  • FIG 8 shows the mechanical structure of an air-cooled rectifier according to the invention.
  • the semiconductor elements are accommodated on a pull-out rectifier module 81.
  • the rectifier module 81 can be inserted into a carrier 82.
  • the carrier 82 is shown in FIG 8 without side walls and without doors. Cooling takes place via an air flow, which is generated by fan 80 generated and flows through the carrier 82 and the inserted rectifier module 81.
  • the semiconductors of the rectifier module 81 are advantageously arranged between heat sinks 33 which are cooled in parallel by the air flow.
  • FIG. 9 shows a converter 95, 96, 97, 98 according to the invention in a rolling mill.
  • the rolling stock 103 is rolled in the roll stands 104, 105, 106, 107, which are driven by electric motors 99, 100, 101, 102.
  • the motors 99, 100, 101, 102 are fed via a transformer 91, 92, 93, 94 and a converter 95, 96, 97, 98 according to the invention through a power supply network 90.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un dispositif d'entraînement pour cages de laminoir, comprenant un système de contrôle fournissant, via des unités de réglage, des valeurs de consigne pour les cages de laminoir, ces cages présentant au moins un moteur électrique qui est alimenté en énergie électrique par un réseau d'alimentation en énergie, via au moins un onduleur à semi-conducteurs de puissance pouvant être mis hors-circuit, dispositif dans lequel l'onduleur est du type à refroidissement par air, la puissance de refroidissement est calculée de telle façon que la température des semi-conducteurs pouvant être mis hors-circuit ne dépasse pas un seuil de température critique, en particulier un seuil de température critique pour un service en continu. L'onduleur présente des corps de refroidissement agencées de façon optimale, lesdits corps de refroidissement étant montés en parallèle au moins partiellement thermiquement.
EP97923797A 1996-05-21 1997-05-09 Dispositif d'entrainement pour cages de laminoir Expired - Lifetime EP0900473B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19620246 1996-05-21
DE19620246 1996-05-21
DE19639962A DE19639962A1 (de) 1996-05-21 1996-09-27 Antriebseinrichtung fü Walzgerüste
DE19639962 1996-09-27
PCT/DE1997/000945 WO1997044888A1 (fr) 1996-05-21 1997-05-09 Dispositif d'entrainement pour cages de laminoir

Publications (2)

Publication Number Publication Date
EP0900473A1 true EP0900473A1 (fr) 1999-03-10
EP0900473B1 EP0900473B1 (fr) 2003-07-23

Family

ID=26025849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97923797A Expired - Lifetime EP0900473B1 (fr) 1996-05-21 1997-05-09 Dispositif d'entrainement pour cages de laminoir

Country Status (3)

Country Link
US (1) US6189352B1 (fr)
EP (1) EP0900473B1 (fr)
WO (1) WO1997044888A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006142357A (ja) * 2004-11-22 2006-06-08 Fanuc Ltd ダイクッション駆動装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2426229C3 (de) 1974-05-29 1979-10-25 Siemens Ag, 1000 Berlin Und 8000 Muenchen Selbsttragender Träger für die Aufnahme von elektronischen Bauelementen
JPS623820A (ja) * 1985-02-25 1987-01-09 Nippon Steel Corp 鋼板の連続圧延設備
JPS6286639A (ja) * 1985-10-09 1987-04-21 Matsushita Electronics Corp マグネトロン装置
US4691274A (en) * 1986-04-29 1987-09-01 Modular Power Corporation Modular electronic power supply
US4864385A (en) 1987-12-29 1989-09-05 Hitachi, Ltd. Power semiconductors connected antiparallel via heatsinks
US4961274A (en) 1989-03-27 1990-10-09 Norman Dryer Company, Inc. Seal system for dryer
US6002183A (en) * 1995-05-04 1999-12-14 Iversen; Arthur H. Power semiconductor packaging
US5491370A (en) * 1994-01-28 1996-02-13 General Motors Corporation Integrated AC machine
US5712802A (en) * 1996-04-16 1998-01-27 General Electric Company Thermal protection of traction inverters
DE19647637A1 (de) * 1996-11-18 1998-05-28 Siemens Ag Walzstraße mit zumindest einem Walzgerüst mit Drehstromantriebssystem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9744888A1 *

Also Published As

Publication number Publication date
WO1997044888A1 (fr) 1997-11-27
EP0900473B1 (fr) 2003-07-23
US6189352B1 (en) 2001-02-20

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